When I set (change) the scheduler in the options, and press "ok" to close the options window it works fine.
Once I open up the options window again (in the same session, don't close Alt.Binz), go to the scheduler page and move my mouse over the scheduler it gives an access violation every time.
When you close Alt.Binz and start it up again, you can change the schedule again just fine (though again only once per session!)